One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,7)(3,11,12,8)(4,13,15,9)(5,10,16,14)(17,18,23,25)(19,24,27,21)(20,26,30,32)(22,28,29,31)(33,34,39,42)(35,38,41,47)(36,37,40,46)(43,44,45,48)(2,7)(3,12)(9,13)(10,14)(17,19,23,27)(18,24,25,21)(20,29,30,22)(26,31,32,28)(33,35)(34,38)(36,43)(37,44)(39,41)(40,45)(42,47)(46,48)(2,7)(5,16)(8,11)(9,13)(18,25)(19,27)(22,29)(26,32)(35,41)(38,47)(43,45)(44,48) involution — undirected(1,3)(2,8)(4,14)(5,9)(6,12)(7,11)(10,15)(13,16)(17,20)(18,26)(19,22)(21,31)(23,30)(24,28)(25,32)(27,29)(33,36)(34,37)(35,43)(38,44)(39,40)(41,45)(42,46)(47,48) involution — undirected(1,4,6,15)(2,9,7,13)(3,10,12,14)(5,8,16,11)(17,21,23,24)(18,27,25,19)(20,28,30,31)(22,32,29,26)(33,37)(34,40)(35,44)(36,42)(38,45)(39,46)(41,48)(43,47)(1,5,6,16)(2,10,7,14)(3,9,12,13)(4,8,15,11)(17,22)(18,28)(19,20)(21,32)(23,29)(24,26)(25,31)(27,30)(33,38,39,47)(34,41,42,35)(36,44,40,48)(37,45,46,43)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.